1. Beverley, P. C. L., in T and B Lymphocytes in Immune Recognition (edit. by Loor, F., and Roelants, G.) (Wiley, Chichester, UK, in the press).
2. Cantor, H., and Asofsky, R., J. exp. Med., 131, 235–246 (1970).
3. Simpson, E., and Cantor, H., Eur. J. Immun., 1, 337–343 (1975).
4. Feldmann, M., Erb, P., Kontiainen, S., and Dunkley, M., in Membrane Receptors of Lymphocytes (edit. by Seligmann, M., Preud'homme, J. L., and Kourilsky, F. M.), 305–310 (North-Holland, Amsterdam, 1975).
5. Boyse, E. A., Myazawa, M., Aoki, T., and Old, L. J., Proc. R. Soc., B 170, 175–193 (1968).